Haidt’s research echoes arguments made by Thomas Sowell in A Conflict of Visions and Steven Pinker in The Blank Slate. Both Sowell and Pinker contend that conservatives see an unfortunate world of moral trade-offs in which every moral judgment comes with costs that must be properly balanced. Progressives, on the other hand, seem to be blind to, or in denial about, these trade-offs, whether economic and social; theirs is a utopian or unconstrained vision, in which every moral grievance must be immediately extinguished until we have perfected society. This is why conservatives don’t tend to express the same emotional hostility as the Left; a deeper grasp of the world’s complexity has the effect of encouraging intellectual humility. The conservative hears the progressive’s latest demands and says, “I can see how you might come to that conclusion, but I think you’ve overlooked the following…” In contrast, the progressive hears the conservative and thinks, “I have no idea why you would believe that. You’re probably a racist.”